Water Unit - all targets
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| True or False - Water is a polar molecule | true
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| polar molecule | a covalent molecule with an overall charge because the electrons are not equally shared - has both positive and negative ends
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| surface tension | the "tightness" at the top of water because the water molecules are sticking together, which allows water drops to have a round shape and allow light objects to rest on top of water's surface
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| capillary action | the combined force of attraction among water molecules and with the molecules of surrounding materials
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| give an example of capillary action from class | when the water "jumped" into the tip of the glass eyedropper - the water was attracted to the polar glass molecules and brought other molecules with it when it "jumped up"
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| give an example of surface tension from class | the large water "dome" on top of penny - able to be done because the water molecules are "holding on to each other" (sticking together); the paper clip resting on top of water surface - did'nt break through the water molecules that are sticking together
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| Which end of the water molecule has a positive charge | the hydrogens
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| which end of the water molecule has a negative charge? | the oxygen end
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| why do water molecules stick together? | the positive hydrogen end of one water molecule sticks to the negative oxygen of another water molecule.
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| as the speed of a river increases, the erosion of the stream | increases
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| as the steepness of a river increases, the speed of the river | increases
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| water moving over a rocky river bed moves (faster or slower?) than a smooth river bottom | slower - the rocks cause friction with the water and the water does not travel as fast across them as it does across a smooth river bottom that does not have as much friction.
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| the wider the river channel, the (faster or slower?) the water moves in the river | the faster the water moves - this is because there is less water rubbing along the sides of the river, which is friction that slows the water down. the more narrow channel causes the water to move slower
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| When water moves along a curve in a river, water moves (slower or faster?) around the outside of the curve | the water moves faster around the outside of the curve
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| does erosion or deposition occur on the outside of a river curve | erosion occurs on the outside of the curve because the water is moving faster
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| When water moves along a curve in a river, water moves (slower or faster?) around the inside of the curve | the water moves slower around the inside of the curve
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| does erosion or deposition occur on the inside of a river curve | deposition occurs on the inside of the curve because the water is moving slower
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| list the past misuses of water | dumping of pollution/chemicals/sewage, heating of water, runoff from farms, overuse, overdevelpment
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| how has the misuse of pollution been changed today? | the clean water act/EPA and laws make this illegal
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| how has the heating of water from power plants changed today? | we not use cooling ponds and have laws and regulation against this
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| How has the misuse of runoff from farms changed today | farms now have a new design to prevent this, laws regulating this, and regulation of chemicals farmers are able to use
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| how has the misuse of overuse changed today? | reulgations of conservation from industry - new standards for showers/toilets that use less water/ people are now aware and conserve more
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| how has the misuse of overdevelopment changed today? | we now have rain gardens and reserved lands.
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Created by:
camponel
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